Cleon OEM cam profiles

Does anyone have a listing for the different cam profiles for the cleon engine? Ive just bought a low milage R5 TS engine stamped C2J. I have a camshaft from a R5 Alpine on the shelf. Would it be worth it to change the camshaft before putting the engine unto my R8?

Hi Frans! There is a downdraft weber fitted. However that is also what is originally fitted to the R5A. I have always thought that the camshaft for the crossflow head was tilitally different from the others but then I saw you mentioning somewhere that your friend Johans car had a non-crossflow engine with R5A camshaft fitted.

The R5A/G cam is totally different to the "wedge head" R5 type C2J motor, and will not work because of valve sequence. Hold the cams together and you will see straight away.

Ray

PS: I am having this discussion with a friend in Mexico who has put a R5 A/G head on an Allience block, and won't understand what I am talking about. They are similar to a Gordini cam and then he realised what I was talking about.

The R5A/G cam is totally different to the "wedge head" R5 type C2J motor, and will not work because of valve sequence. Hold the cams together and you will see straight away.

Ray

PS: I am having this discussion with a friend in Mexico who has put a R5 A/G head on an Allience block, and won't understand what I am talking about. They are similar to a Gordini cam and then he realised what I was talking about.

Reidar,
Cat Cams grind good cams for Renault, and same as Alconi (no longer making) from South Africa, they modified Renault profiles for their profiles. The wedge head Cleon/Sierra motor can be made to be a lot of fun with the right cam. I always take a look at the Alconi profiles before deciding on some other cams, because I know them so well. "675" and "701" are the 2 street profiles I liked. They worked well on wedge heads, Gordini, 807, and the R5 A/G. So they are true Renault cams.

Lots of good info here. Sorry that I havent replied. I understand that I got confused about the RA5 camshaft profile and the oe camshaft for the Renault 5 Alpine witch I have sitting on the shelf.

Lately "Real Power" from Brazil started a thread about the Sierra/Cleon based CHT1600 engines used in warios Ford and WV models witch apart from the 83,5mm crankshaft also came with some interresting camshafts. Some of them have a 292degrees duration...

In the eighties quite a few Brazilian Ford Escorts were sold in Norway and I have most of the engine parts from one of them. I also have a workshop manual for it edited by the dealership.

The specs on my CHT camshaft are 18-74-62-30 so 272 degrees duration. The camshaft lift is 5,794 and 5,829mm.

According to my R5 Hynes manual my R5 TS engine(1400cc C2J) is like this 12-62-65-25, so 254/272 degree duration. The manual does not say however how mutch litft there is.

Is it likely that there is some gain in fitting the CHT camshaft to the C2J engine?

I think that there will be a slight improvement because with the CHT cam the intake duration is much longer than the C2J cam. When higher performance (higher air flow) is needed then this longer intake duration will be of benefit. I don't think the lift will be changed much because it is a "family car" engine and not a performance model. If the cam lift is given as 5.8mm then the valve lift will be 5.8x1.5=8.7mm with the rocker ratio taken into account.

Just keep in mind that the specs on the duration in your manuals are the advertised durations. When performance cuts are mentioned the duration will normally be the duration after the valve has already lifted 0.050" or 1.27mm.

Thanks Frans!
The specs on the valve timing/duration of the oe Renault camshafts are easy to find but the lift is not. So I had a look for this info on similar engines. The closest I could find was the Cortina GT camshaft as that is reproduced by Kentcams to be used in Formula Ford.
By chance the Cortina GT camshaft is near identical to my CHT cam in duration and lift. Kent Cams - Product - Camshaft / Camshaft / XFGT
It doesent mean anything of course. Just a coincidence.